[1/3] ASoC: dapm: connect virtual mux with default value
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Message ID 012601d60728$b090bc50$11b234f0$@samsung.com
State New
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Series
  • [1/3] ASoC: dapm: connect virtual mux with default value
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Commit Message

Gyeongtaek Lee March 31, 2020, 6:50 a.m. UTC
Since a virtual mixer has no backing registers to decide which path to connect, it will try to match with initial value 0.
This is to ensure that the default mixer choice will be correctly powered up during initialization.

Signed-off-by: Gyeongtaek Lee <gt82.lee@samsung.com>
---
 sound/soc/soc-dapm.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

--
2.21.0

Patch
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diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 9fb54e6fe254..fc55a0534252 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -802,7 +802,16 @@  static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
 			val = max - val;
 		p->connect = !!val;
 	} else {
-		p->connect = 0;
+		/* since a virtual mixer has no backing registers to
+		 * decide which path to connect, it will try to match
+		 * with initial value 0.  This is to ensure
+		 * that the default mixer choice will be
+		 * correctly powered up during initialization.
+		 */
+		val = 0;
+		if (invert)
+			val = max - val;
+		p->connect = !!val;
 	}
 }